Unified contention based period
AssigneeSTMicroelectronics S.r.l.
InventorsLiwen Chu, George Vlantis
Life of this patent
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Abstract
A unified contention based protocol is implemented in which a source station within a basic service set selects the protection methodology for data transmission on the communication medium. Utilizing EDCA as a medium access method and maintaining that each transmission opportunity has multiple slots, the source station is provided with the opportunity to select a protection methodology based on the protection environment, which enables transmission opportunity protection without direct PCP involvement.
Claims18
A method for transmission opportunity protection in a basic service set (BSS) of a wireless network, comprising a personal independent BSS coordination point (PCP) for which there can be time periods when the PCP is not available to transmit messages between stations of the BSS, the method comprising:
- using an Enhanced Distributed Channel Access (EDCA) method for medium access control within the BSS;
- using multiple slots for transmission opportunities;
- determining, by a source station within the BSS, the availability of the PCP for transmitting messages to a plurality of stations within the BSS for protection of a transmission opportunity;
- responsive to the PCP being available, transmitting, by the source station a target request to send (TRTS) message to the PCP;
- responding, by the PCP, to the TRTS with a target clear to send (TCTS) message to the plurality of stations within the BSS;
- receiving at a destination station the TCTS message;
- and
- transmitting data between the source station and the destination station during the transmission opportunity.
A method for transmission opportunity protection in a basic service set (BSS) of a wireless network, comprising a personal independent BSS coordination point (PCP) for which there can be time periods when the PCP is not available to transmit messages between stations of the BSS, the method comprising:
- using an Enhanced Distributed Channel Access (EDCA) method for medium access control within the BSS;
- using multiple slots for transmission opportunities;
- initiating, by a personal independent BSS coordination point (PCP), a transmission opportunity between a source station and a destination station of the BSS;
- transmitting by the PCP a first target clear to send (TCTS) message to each of a plurality of stations within the BSS including the destination station and the source station;
- transmitting by the PCP a target request to send (TRTS) message to the plurality of stations, including the destination station;
- transmitting by the destination station, in response to the TRTS message, a second TCTS message to the PCP;
- and
- transmitting data between the source station and the destination station during the transmission opportunity.
A method for transmission opportunity protection in a basic service set (BSS) of a wireless network, comprising a personal independent BSS coordination point (PCP) for which there can be time periods when the PCP is not available to transmit messages between stations, the method comprising:
- using an Enhanced Distributed Channel Access (EDCA) method for medium access control within the BSS;
- using multiple slots for transmission opportunities;
- determining, by a source station within the BSS, the availability of the PCP for transmitting to a plurality of stations within the BSS messages for protection of a transmission opportunity;
- responsive to the PCP being unavailable, transmitting by the source station a request to send (RTS) message to each of a plurality of stations within the BSS;
- transmitting, by a destination station, a CTS message to the source station after receiving the RTS message;
- and
- transmitting data between the source station and the destination station during the transmission opportunity.
Dependencies are inferred from the claim text.